/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.mpp.plan.planner.plan.node.load;

import org.apache.iotdb.common.rpc.thrift.TRegionReplicaSet;
import org.apache.iotdb.db.engine.storagegroup.TsFileResource;
import org.apache.iotdb.db.mpp.plan.analyze.Analysis;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNode;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNodeId;
import org.apache.iotdb.db.mpp.plan.planner.plan.node.WritePlanNode;
import org.apache.iotdb.db.mpp.plan.statement.crud.LoadTsFileStatement;
import org.apache.iotdb.tsfile.exception.NotImplementedException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

public class LoadTsFileNode extends WritePlanNode {
    private static final Logger logger = LoggerFactory.getLogger(LoadTsFileNode.class);

    private final List<TsFileResource> resources;

    public LoadTsFileNode(PlanNodeId id) {
        this(id, new ArrayList<>());
    }

    public LoadTsFileNode(PlanNodeId id, List<TsFileResource> resources) {
        super(id);
        this.resources = resources;
    }

    @Override
    public TRegionReplicaSet getRegionReplicaSet() {
        return null;
    }

    @Override
    public List<PlanNode> getChildren() {
        return null;
    }

    @Override
    public void addChild(PlanNode child) {
    }

    @Override
    public PlanNode clone() {
        throw new NotImplementedException("clone of load TsFile is not implemented");
    }

    @Override
    public int allowedChildCount() {
        return NO_CHILD_ALLOWED;
    }

    @Override
    public List<String> getOutputColumnNames() {
        return null;
    }

    @Override
    protected void serializeAttributes(ByteBuffer byteBuffer) {
    }

    @Override
    protected void serializeAttributes(DataOutputStream stream) throws IOException {
    }

    @Override
    public List<WritePlanNode> splitByPartition(Analysis analysis) {
        List<WritePlanNode> res = new ArrayList<>();
        LoadTsFileStatement statement = (LoadTsFileStatement) analysis.getStatement();
        for (TsFileResource resource : resources) {
            try {
                LoadSingleTsFileNode singleTsFileNode =
                        new LoadSingleTsFileNode(
                                getPlanNodeId(),
                                resource,
                                statement.isDeleteAfterLoad(),
                                analysis.getDataPartitionInfo());
                singleTsFileNode.checkIfNeedDecodeTsFile();
                res.add(singleTsFileNode);
            } catch (Exception e) {
                logger.error(
                        String.format(
                                "Check whether TsFile %s need decode or not error", resource.getTsFile().getPath()),
                        e);
            }
        }
        return res;
    }
}
